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September 08, 2026 3 min read
Product family guide for Linear TRANS PROX and MegaCode wireless transmitters and 125 kHz proximity tags for door, gate, and garage access systems.
Product family guide for Linear TRANS PROX and MegaCode transmitters — integrated wireless transmitters and 125 kHz proximity tags for door and gate access systems, garage door operators, and telephone entry systems.
TRANS PROX combines a wireless transmitter with a 125 kHz proximity tag in one key-fob device — ideal for door and gate access systems and garage door operators. All models are block-coded to one of 15 facility codes, quick and easy to enroll, supplied with a quick-disconnect key ring, use long-lasting lithium batteries, and are ruggedly built for everyday use. Available in single-channel and 4-channel packages.
Ideal for door and gate access systems and garage door operators. Compatible with all Linear MegaCode receivers and controllers; block-coded to one of 15 facility codes; quick and easy to enroll; available in single-channel and 4-channel packages.
| Dimensions | 1.25" W x 2.25" H x 0.5" D (38.1 x 57.15 x 12.7 mm) |
| Power | Two 3V 2016-style batteries |
| Transmitter Frequency | 318 MHz |
| Transmitter Format | MegaCode |
| Number of Transmitter Codes | 1,000,000+ ID codes (15 facility codes) |
| Proximity Format | 125 kHz non-proprietary proximity, 26-bit Wiegand (TRANS PROX only) |
| Accessories | Quick-disconnect key ring |
| Model Number | Part Number | Description | Ordering |
|---|---|---|---|
| ACT-31DH | ACP00957 | TRANS PROX single-button, factory block coded | Lots of 10 |
| ACT-34DH | ACP00958 | TRANS PROX four-button, factory block coded | Lots of 10 |
| ACT-31DHC | ACP00959 | TRANS PROX single-button, custom block coded | Built to order |
| ACT-34DHC | ACP00960 | HID-compatible TRANS PROX four-button, custom block coded | Built to order |
| ACT-31D | ACP00954 | TRANS PROX single-button, Linear format, factory coded | Lots of 10 |
| ACT-34D | ACP00955 | TRANS PROX four-button, Linear format, factory coded | Lots of 10 |
| ACT-31B | ACP00879 | Transmitter single-button, factory block coded | Lots of 10 |
| ACT-34B | ACP00872 | Transmitter four-button, factory block coded | Lots of 10 |
| ACT-31C | ACP00939 | Transmitter single-button, custom block coded | Built to order |
| ACT-34C | ACP00940 | Transmitter four-button, custom block coded | Built to order |
TRANS PROX and 26-bit Wiegand compatible proximity readers work with a range of Linear (Nortek Security & Control) access control products, including:
Before selecting and installing 3rd-party readers, Linear recommends evaluating them for acceptable performance.
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